Door corners are $10ea in a single color. 2 color is $16ea.
Acrylic is available in limited colors starts at $15 for a one layer and $23 for a 2 layer. Prices are plus shipping which is a little expensive to protect the items. These are 11" at the longest point. I can make larger let me know what you need and I can give you a price.  See examples of others I have done and available images. Something special again just let me know.